The redesigned 6.8L marine engine is 9 inches (229 mm) narrower than the previous design. The 6.8L propulsion engine is due to hit the water in the fall of 2011, while the generator drive ratings will be available in 2012. JDPS said the newly redesigned engine meets Environmental Protection Agency Marine Tier 2 European Union emissions requirements and is MARPOL Annex VI compliant.